Pharmacist Raj Patel has advised people taking atorvastatin who feel unwell to ask themselves four key questions: when the symptom started, how severe it is, whether it is getting worse, and whether anything else could explain it. He shared the guidance in a TikTok video and subsequent comments.
Atorvastatin is the most frequently prescribed statin in the UK, taken by more than five million people, with over 78 million items of the drug dispensed in England in the year 2025/26. While it helps protect the majority of users, the medication carries some side effects.
Which side effects are worth knowing?
Patel said most people taking atorvastatin tolerate it well, but side effects can still happen. Some people report headache, nausea, indigestion, diarrhoea, and muscle and joint pain. He stressed that a symptom appearing while taking atorvastatin does not automatically prove the statin caused it.
He said timing matters, other medicines matter, and other health problems can matter too. If a new symptom is persistent, troublesome, or started after beginning atorvastatin or increasing the dose, people should speak to their pharmacist or prescriber.
Symptoms to take more seriously
Patel highlighted symptoms that should be taken more seriously. Unexplained muscle pain, tenderness, or weakness, particularly if severe, or darker urine, needs prompt medical attention. Yellowing of the skin or eyes can be a sign of a severe liver problem and needs urgent assessment.
He advised: "Don't ignore a possible side effect, but don't diagnose yourself from the leaflet either. Report it, review it, then decide what happens with your healthcare professional."
What is the useful question?
Patel clarified that the useful question is not simply whether the symptom is on the leaflet. Instead, patients should ask when it started, how severe it is, whether it is getting worse, and whether anything else could explain it.
Reported atorvastatin side effects include headache, dizziness, nausea, indigestion, diarrhoea, constipation, muscle aches, and swollen or aching joints. If a symptom is mild but bothers the patient or does not settle, they should speak to their pharmacist or prescriber.
Should you stop the medication?
Patel advised against discontinuing the medication upon experiencing side effects unless directed to do so by a healthcare professional. Atorvastatin may have been prescribed to reduce the risk of heart attack or stroke, and a review can look at timing, dose, other medicines, health conditions, and whether blood tests or a treatment change are needed.
He outlined when to seek urgent assistance, advising people to call NHS 111 if they think they may be having a serious atorvastatin side effect, and to call 999 for signs of a severe allergic reaction, such as difficulty breathing or swelling of the throat or tongue.
Patel also outlined a checklist for patients experiencing symptoms: write down the symptom and when it began, note whether the dose or another medicine changed, describe how severe it is and what it stops the patient doing, ask for a medication review, and do not diagnose yourself from a long leaflet list.
